ballsack vs coin purse

ballsack

coin purse

noun
  • A small bag or pouch designed for carrying money, particularly coins. 

  • Testicles. 

  • a type of theatrical performance undergarment used to hide male genitalia, by stuffing it into a pouch with a drawstring, to simulate being nude 

How often have the words ballsack and coin purse occurred in a corpus of books? (source: Google Ngram Viewer )